Micro Numerical Simulation of Creep Mechanical Behavior of Aluminum Silicate Short Fiber-Reinforced AZ91D Magnesium Matrix Composite

TIAN Jun; CHEN Zhou-quan; ZHONG Shou-yan

doi:10.3879/j.issn.1000-0887.2014.05.006

Volume 35 Issue 5

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TIAN Jun, CHEN Zhou-quan, ZHONG Shou-yan. Micro Numerical Simulation of Creep Mechanical Behavior of Aluminum Silicate Short Fiber-Reinforced AZ91D Magnesium Matrix Composite[J]. Applied Mathematics and Mechanics, 2014, 35(5): 523-532. doi: 10.3879/j.issn.1000-0887.2014.05.006

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Micro Numerical Simulation of Creep Mechanical Behavior of Aluminum Silicate Short Fiber-Reinforced AZ91D Magnesium Matrix Composite

doi: 10.3879/j.issn.1000-0887.2014.05.006

¹School of Mechanical Engineering, Dongguan University of Technology, Dongguan, Guangdong 523808, P.R.China;²School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P.R.China

Received Date: 2013-06-17
Rev Recd Date: 2014-03-21
Publish Date: 2014-05-15

Abstract

Abstract

A research was conducted on the micro mechanism of the creep mechanical behavior of aluminum silicate short fiber-reinforced AZ91D magnesium matrix composite. The unit cell model was applied together with the finite element method (FEM) of ABAQUS to simulate the composite. The FEM results show that the distribution of stress and strain in the fiber and matrix is roughly uniform in each segment, the fiber assumes far higher equivalent Mises stress than the matrix, and there is distinct stress concentration around the interface between the matrix and the fiber. The creep fracture of the composite goes through three microscopic processes. With the increase of creep deformation, the short fiber bears and transfers the load with various damages, fracture and multiple fracture, which strengthens the creep resistance of the matrix. The micro-cracks generated at the weak interface continue to expand, causing sharp fall of the creep resistance and in turn fracture of the composite.
- magnesium matrix composite,
- unit cell model,
- finite element method,
- creep fracture,
- axial stress

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References(23)

References

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